1220797 has 2 divisors, whose sum is σ = 1220798. Its totient is φ = 1220796.

The previous prime is 1220783. The next prime is 1220801. The reversal of 1220797 is 7970221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1207801 + 12996 = 1099^2 + 114^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220797 - 2⁷ = 1220669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610398 + 610399.

It is an arithmetic number, because the mean of its divisors is an integer number (610399).

2^1220797 is an apocalyptic number.

It is an amenable number.

1220797 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220797 is an equidigital number, since it uses as much as digits as its factorization.

1220797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 1220797 is about 1104.8968277627. The cubic root of 1220797 is about 106.8762362065.

The spelling of 1220797 in words is "one million, two hundred twenty thousand, seven hundred ninety-seven".